program.s

.global _start            // Provide program starting address to linker
.align 4            // Make sure everything is aligned properly

// Setup the parameters to print hello world
// and then call the Kernel to do it.
_start: mov    X0, #1        // 1 = StdOut
    adr    X1, helloworld     // string to print
    mov    X2, #13            // length of our string
    mov    X16, #4        // Unix write system call
    svc    #0x80        // Call kernel to output the string

// Setup the parameters to exit the program
// and then call the kernel to do it.
    mov     X0, #0        // Use 0 return code
    mov     X16, #1        // System call number 1 terminates this program
    svc     #0x80        // Call kernel to terminate the program

helloworld:      .ascii  "Hello World!\n"